New Leader Won’t Shift Pro-EU Stance, Says Labour Party Spokesman

A change in leadership of Britain’s Labour Party has raised questions about whether the U.K.’s main opposition party would diverge from its previous pro-European Union stance.

Jeremy Corbyn, a little-known party veteran and leading anti-war campaigner, won the Labour leadership contest on Saturday after securing almost 60% of the votes, a surprisingly strong endorsement that is expected to herald a sharp shift to the left.

But his lukewarm views on the EU have raised questions about how the party under him would campaign in the referendum on Britain’s continued membership that Prime Minister David Cameron has promised to hold before the end of 2017. Mr. Cameron, who has said he wants to remain in a reformed EU, has promised to negotiate changes to the U.K.’s relationship with the bloc ahead of the vote.